SPID description of Turbo 400 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dan42 · 10-19-2009, 10:57 PM

What should the SPID say for a turbo 400? This one just says turbo-hydramatic, but I'm not sure what the code means. Can anyone decipher it for me? (This is the truck I think I'm gonna get).

**too much stuff** · 10-19-2009, 11:17 PM

I think the 350 and 400s had the same code. Not sure about the glide however.

Longhorn Man · 10-20-2009, 12:05 AM

M49 in a pickup covers both TH350 and TH400. A hand full did get some other code for the TH350, butmore often than not, m49 covered both 3 speed hydromatics. Some people on here have said they think an astric after the code ment 400, but I've seen original TH400 trucks without the astric.

However, being that you are looking at a big block truck, it would have been a TH400.

That looks like a well equipped 70 BB longhorn there.

*2tons of fun* · 10-20-2009, 12:27 AM

i thought m40 was th350 and m49 was th400.

and that is a very nicely equiped truck not to often do you see the extra battery.

Longhorn Man · 10-20-2009, 12:42 AM

my one ton and my old 3/4 ton both came with the TH350 and they were M49. One was built in St louis and the other in Baltimore... both 1970 model trucks. (one in april, the other in june if memory serves)
My other 2 trucks were TH400 trucks, and they were both M49... a 69 built in St louis, and off the top of my head I can't remember where the suburban was built.
Like i said, there were some that got typed up with the car code for the Th350, but the trucks were supposed to be M49 for either one.

**special-K** · 10-20-2009, 06:09 AM

There is nothing specifying which Turbo Hydramatic the truck is equipped with,just M49...only code.

68Lowrider · 10-20-2009, 08:22 AM

Looking uo the GM engine code can aid in what trans should have been installed with certain engine . L47 would be a 400 etc.

Longhorn Man · 10-20-2009, 11:06 PM

a big block would have had a TH400, yes, but any of the other engines could have had any of the trannys... seen inlines and small blocks with TH400's, seen inlines and small blocks with powerglides, and seen inlines and small blocks with TH350's. Seen the TH350 and 400 in C/10 C/20 and in C/30... only seen the powerglide in C/10 trucks though.

10-19-2009, 10:57 PM	#1
dan42 Registered User Join Date: Feb 2007 Location: Cali Central Coast Posts: 5,191	SPID description of Turbo 400 What should the SPID say for a turbo 400? This one just says turbo-hydramatic, but I'm not sure what the code means. Can anyone decipher it for me? (This is the truck I think I'm gonna get). Attached Images __________________ '67 SWB Fleetside ZZ4/350/Tremec 5-speed/4link/Scott's IFS - and fun as heck! SOLD Click here to support the board Philippians 4: 6-7

10-19-2009, 11:17 PM	#2
too much stuff Roadtrip! Join Date: Feb 2003 Location: Grand Rapids MN Posts: 13,714	Re: SPID description of Turbo 400 I think the 350 and 400s had the same code. Not sure about the glide however. __________________ 67 gmc custom lwb dakota truck. Sold...And bought back 69 swb 4x4 project (in progress) 70 c-10 lwb texas truck 70 4x4/BB/bkts/posi/tach(retired) 70 swb (wifes) 70 jimmy camper 71 K-5 factory 2wd 71 cheyenne 4x4/tach/posi/ plow rig 71 Cheyenne20 BB, buckets, tach, tilt, 4 speed 72 jimmy CST wyoming rig 72 jimmy Colorado rig 72 lifted texas 4x4 3/4 ton burb 65 fury conv. 383/auto 65 chrysler 300 "L" 413 auto

10-20-2009, 12:05 AM	#3
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: SPID description of Turbo 400 M49 in a pickup covers both TH350 and TH400. A hand full did get some other code for the TH350, butmore often than not, m49 covered both 3 speed hydromatics. Some people on here have said they think an astric after the code ment 400, but I've seen original TH400 trucks without the astric. However, being that you are looking at a big block truck, it would have been a TH400. That looks like a well equipped 70 BB longhorn there.

10-20-2009, 12:27 AM	#4
2tons of fun Account Suspended Join Date: Jan 2009 Location: galt ca, Posts: 749	Re: SPID description of Turbo 400 i thought m40 was th350 and m49 was th400. and that is a very nicely equiped truck not to often do you see the extra battery.

10-20-2009, 12:42 AM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: SPID description of Turbo 400 my one ton and my old 3/4 ton both came with the TH350 and they were M49. One was built in St louis and the other in Baltimore... both 1970 model trucks. (one in april, the other in june if memory serves) My other 2 trucks were TH400 trucks, and they were both M49... a 69 built in St louis, and off the top of my head I can't remember where the suburban was built. Like i said, there were some that got typed up with the car code for the Th350, but the trucks were supposed to be M49 for either one.

10-20-2009, 06:09 AM	#6
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,863	Re: SPID description of Turbo 400 There is nothing specifying which Turbo Hydramatic the truck is equipped with,just M49...only code. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

10-20-2009, 08:22 AM	#7
68Lowrider Registered User Join Date: Aug 2008 Location: Parker Dam California Posts: 71	Re: SPID description of Turbo 400 Looking uo the GM engine code can aid in what trans should have been installed with certain engine . L47 would be a 400 etc.

10-20-2009, 11:06 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: SPID description of Turbo 400 a big block would have had a TH400, yes, but any of the other engines could have had any of the trannys... seen inlines and small blocks with TH400's, seen inlines and small blocks with powerglides, and seen inlines and small blocks with TH350's. Seen the TH350 and 400 in C/10 C/20 and in C/30... only seen the powerglide in C/10 trucks though.



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